|
| Table 5. | Kinetic relations of recycling fed-batch culture for enhanced citric acid production by Aspergillus niger NGGCB101. |
| Sampling vs. fed-batch |
Growth yield coefficients (g/g) |
Volumetric rates (g/l/h) |
Specific rate constants (g/g/h) |
Significance
level |
||||
| Liters |
% |
Yp/s |
Yp/x |
Qp |
Qs |
qs |
qx |
|
| Control 1.0 2.0 3.0 4.0 5.0 |
- 11.50 22.50 33.50 44.50 55.50 |
0.964±0.03 0.987±0.02 0.710±0.04 0.878±0.04 1.661±0.02 0.303±0.04 |
5.444±0.01 5.745±0.01 6.081±0.02 7.223±0.02 8.607±0.01 5.004±0.02 |
0.299±0.02 0.678±0.02 0.601±0.02 0.817±0.02 0.943±0.02 0.598±0.03 |
0.922±0.04 1.243±0.02 0.930±0.02 1.009±0.02 1.799±0.02 0.902±0.02 |
0.075±0.03 0.098±0.02 0.128±0.02 0.135±0.02 0.238±0.03 0.097±0.05 |
0.041±0.02 0.052±0.02 0.085±0.03 0.108±0.02 0.113±0.02 0.064±0.04 |
S - - S HS - |
| LSD |
0.0345 |
0.321 |
0.112 |
0.212 |
0.678 |
0.542 |
||
| ±
indicates standard deviation among replicates. p indicates probability
significance level. HS denotes that the values are highly significant
while S is for only significant values. LSD is for least significant
difference. The values differ significantly at p < 0.020.
|
| |